Cargo conveying device, cargo conveying system, and cargo conveying method

ABSTRACT

A cargo conveying device includes: a horizontal direction conveying section that conveys cargo in a horizontal direction, and that includes a transfer section at which cargo is transferred between the transfer section and a cargo handler; a height adjusting section that adjusts a vertical direction height of the transfer section; and a control section that, at a time at a time at which cargo is transferred between the transfer section and a cargo handler, operates the height adjusting section, and adjusts the vertical direction height of the transfer section.

CROSS-REFERENCE TO RELATED APPLICATION

This application is based on and claims priority under 35 USC 119 fromJapanese Patent Application No. 2020-195317 filed on Nov. 25, 2020, thedisclosure of which is incorporated by reference herein.

BACKGROUND Technical Field

The present disclosure relates to a cargo conveying device, a cargoconveying system, and a cargo conveying method.

Related Art

A conveying method that conveys cargo to the respective floors at thetime of constructing a building is disclosed in Japanese PatentApplication Laid-Open (JP-A) No. H07-26729. In the conveying methoddisclosed in this document, a raising/lowering device is provided withinan elevator shaft. A first hoist rail, which faces the elevatorentrance/exit, is mounted to the raising/lowering device. A second hoistrail is provided on a floor of the building. A trolley hoist is engagedwith the first hoist rail and the second hoist rail. In the state inwhich the trolley hoist is positioned on the first hoist rail, the cargois suspended at the first hoist rail. Next, the cargo is movedvertically due to the raising/lowering device being moved in thevertical direction within the elevator shaft. Next, the raising/loweringdevice is made to stand still at a position corresponding to the floorat which the second hoist rail is provided, and the end portion of thefirst hoist rail and the end portion of the second hoist rail are setface-to-fact to one another and are connected together. Then, the cargois moved horizontally due to the trolley hoist being made to travelalong the first hoist rail and the second hoist rail. Cargo may beconveyed to each floor in the building in this way.

In a cargo conveying device and cargo conveying system that include astep of transferring the conveyed cargo between the device and a cargohandler, it is desirable to be able to reduce the load on the cargohandler. In the conveying method disclosed in JP-A No. H07-26729, thereis room for improvement with regard to this point.

SUMMARY

In view of the above-described circumstances, the present disclosureprovides a cargo conveying device, a cargo conveying system, and a cargoconveying method that may reduce the load on a cargo handler.

A first aspect of the present disclosure is a cargo conveying deviceincluding: a horizontal direction conveying section that conveys cargoin a horizontal direction, and that includes a transfer section at whichcargo is transferred between the transfer section and a cargo handler; aheight adjusting section that adjusts a vertical direction height of thetransfer section; and a control section that, at a time at a time atwhich cargo is transferred between the transfer section and a cargohandler, operates the height adjusting section, and adjusts the verticaldirection height of the transfer section.

In accordance with the first aspect, cargo is conveyed in the horizontaldirection by the horizontal direction conveying section. At the transfersection of the horizontal direction conveying section, the cargo istransferred between the transfer section and a cargo handler. Here, thecontrol section operates the height adjusting section at the time whencargo is transferred between the transfer section and the cargo handler.Due thereto, the vertical direction height of the cargo at the transfersection is adjusted, and the load on the cargo handler may be reduced.

The first aspect may further include a vertical direction conveyingsection that conveys cargo in a vertical direction.

In accordance with the above-described structure, cargo may be conveyedin the vertical direction and the horizontal direction by the verticaldirection conveying section and the horizontal direction conveyingsection.

In the first aspect, the control section may adjust the verticaldirection height of the transfer section to a height that corresponds toat least one of a physique or a posture of the cargo handler.

In accordance with the above-described structure, the vertical directionheight of the cargo at the transfer section is adjusted to a height thatcorresponds to at least one of the physique and the posture of the cargohandler. Due thereto, the load on the cargo handler may be reduced evenmore.

The first aspect may further include a sensor that detects at least aportion of a body of the cargo handler, wherein: the control section mayestimate the at least one of the physique or the posture of the cargohandler based on a signal from the sensor, and the control section mayadjust the height of the transfer section based on the at least one ofthe physique or the posture of the cargo handler that has beenestimated.

In accordance with the above-described structure, the control sectionestimates at least one of the physique and the posture of the cargohandler based on a signal from the sensor. Due thereto, the verticaldirection height of the cargo at the transfer section may be adjustedwhile taking individual differences in physiques and postures of cargohandlers into consideration.

The first aspect may further include a physique information inputsection at which physique information of the cargo handler is input,wherein the control section may adjust the height of the transfersection based on the physique information of the cargo handler that hasbeen input at the physique information inputting section.

In accordance with the above-described structure, physique informationof the cargo handler is inputted at the physique information inputtingsection. Due thereto, the vertical direction height of the cargo at thetransfer section may be adjusted while taking individual differences inphysiques and postures of cargo handlers into consideration.

In the first aspect, the control section may adjust the verticaldirection height of the transfer section to a height that is greaterthan or equal to a height of a waist of the cargo handler and that is ata position that faces the cargo handler in a horizontal direction.

In accordance with the above-described structure, the vertical directionheight of the cargo at the transfer section is adjusted to a height thatis greater than or equal to the height of the waist of the cargo handlerand that is at a position that faces the cargo handler in the horizontaldirection. Due thereto, the load on the lumbar region of the cargohandler may be reduced effectively.

A second aspect of the present disclosure is a cargo conveying systemincluding: the cargo conveying device of the first aspect; a secondcargo conveying device that conveys cargo and at which cargo istransferred between the cargo conveying device and the second cargoconveying device, wherein cargo is conveyed between a distributionwarehouse and a cargo handler using the cargo conveying device and thesecond cargo conveying device.

In accordance with the second aspect, cargo is conveyed between adistribution warehouse and a cargo handler by using the cargo conveyingdevice and the second cargo conveying device. Here, in accordance withthe cargo conveying device that structures a portion of the cargoconveying system, the cargo is conveyed in the horizontal direction bythe horizontal direction conveying section. At the transfer section ofthe horizontal direction conveying section, the cargo is transferredbetween the transfer section and the cargo handler. Here, the controlsection operates the height adjusting section at the time when cargo istransferred between the transfer section and the cargo handler. Duethereto, the vertical direction height of the cargo at the transfersection is adjusted, and the load on the cargo handler may be reduced.

A third aspect of the present disclosure is a method of operating thecargo conveying device of the first aspect, including: receiving atleast one of physique information or posture information of a cargohandler; and adjusting the vertical direction height of the transfersection based on the at least one of the physique information or theposture information of the cargo handler that has been received.

In the third aspect, the cargo conveying device may a sensor thatdetects at least a portion of a body of a cargo handler, receiving theat least one of physique information or posture information of the cargohandler may include receiving of a signal from the sensor, and themethod may further include: estimating at least one of a physique or aposture of the cargo handler based on the signal from the sensor; andadjusting the height of the transfer section based on the at least oneof the physique or the posture of the cargo handler that has beenestimated.

In accordance with the cargo conveying device, the cargo conveyingsystem, and the cargo conveying method relating to the presentdisclosure, load on a cargo handler may be reduced.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic drawing illustrating a portion of a city in whicha cargo conveying system of a present embodiment is applied.

FIG. 2 is a perspective view illustrating a first conveying vehicle anda second conveying vehicle.

FIG. 3 is a perspective view illustrating a cargo handler and the firstconveying vehicle.

FIG. 4 is a block drawing illustrating a control section and the like ofthe first conveying vehicle.

FIG. 5 is a side view illustrating the cargo handler and the firstconveying vehicle.

FIG. 6 is a perspective view illustrating a third conveying vehicle anda conveying device for a building.

FIG. 7 is a block drawing illustrating the conveying device for abuilding.

FIG. 8 is a flowchart for explaining control by the control section of afirst transporting vehicle.

FIG. 9 is a side view illustrating the conveying device for a building,and a delivery destination and a requester.

FIG. 10 is a flowchart for explaining control by a control section ofthe conveying device for a building.

FIG. 11 is a schematic drawing illustrating an ID card and an ID cardreader.

DETAILED DESCRIPTION

A cargo conveying system, cargo conveying device, and a cargo conveyingmethod relating to an embodiment of the present disclosure are describedby using FIG. 1 through FIG. 7. Note that arrow U that is illustratedappropriately in the drawings indicates upward in the verticaldirection, and arrow H indicates one direction in the horizontaldirection.

As illustrated in FIG. 1, the cargo conveying system of the presentembodiment is a system that, for example, is used to deliver cargo 12that are collected in a distribution warehouse 10 to deliverydestinations 14, or is used to deliver the cargo 12 from a requester 16to the distribution warehouse 10.

The distribution warehouse 10 is a distribution base to which the cargo12, which are to be delivered to the respective delivery destinations 14that are within a predetermined area 18, are brought from other areas,and at which the cargo 12, which are to be sent out from requesters 16within the predetermined area 18, are brought. This distributionwarehouse 10 is provided on ground 20 of the area 18. An undergroundpassage 24 for distribution is provided in an underground 22 of the area18 at which the distribution warehouse 10 is provided. The undergroundpassage 24 and the distribution warehouse 10 are connected in thevertical direction. By using a lift 26 that serves as the secondconveying device, the cargo 12 and the like (including racks 70, thirdtransporting vehicles 36 and the like that are described later) that arewithin the underground passage 24 may be moved into the distributionwarehouse 10, and the cargo 12 and the like that are within thedistribution warehouse 10 may be moved into the underground passage 24.Further, a building 28 that is provided in the area 18 and theunderground passage 24 are connected in the vertical direction. By usinga conveying device 30 for a building that serves as the cargo conveyingdevice, the cargo 12 that are within the underground passage 24 may bemoved into the building 28, and the cargo 12 that are within thebuilding 28 may be moved into the underground passage 24.

The transporting of the cargo 12 on the ground 20 is carried out mainlyby first transporting vehicles 32 that serve as the cargo transportingdevices, and a second transporting vehicle 34 that serves as the secondconveying device. Further, the transporting of the cargo 12 in theunderground passage 24 is carried out mainly by the third transportingvehicles 36 that serve as the second conveying devices.

As illustrated in FIG. 2 and FIG. 3, the first transporting vehicle 32includes a base 40 that serves as the horizontal direction conveyingsection and that travels on the ground due to wheels 38 rotating, and apost 42 that stands upright at the base 40. Further, the firsttransporting vehicle 32 includes a cargo supporting section 44, whichserves as a transfer section that is supported at the base 40 via thepost 42 and by which the cargo 12 is transferred between a cargo handlerP and the second transporting vehicle 34, and a sensor 46 that detectsthe situation at the periphery. As illustrated in FIG. 3 and FIG. 4, amotor and a battery that cause the wheels 38 to rotate, and a controlsection 48 that controls the respective sections of the firsttransporting vehicle 32, and the like, are stored in the base 40.Further, the cargo supporting section 44 is formed in the shape of arectangular frame. The cargo 12 is supported at the inner side of thiscargo supporting section 44. Moreover, a height adjusting section 50that adjusts the vertical direction position of the cargo supportingsection 44 is provided at the post 42. As illustrated in FIG. 3 and FIG.5, the vertical direction position of the cargo supporting section 44 isadjusted due to this height adjusting section 50 being operated.

As illustrated in FIG. 4, the control section 48 includes a CentralProcessing Unit: processor (CPU) 52, a Read Only Memory (ROM) 54, aRandom Access Memory (RAM) 56, a storage 58, and an input/outputinterface (I/F) 60 that carries out communication with external devicesand the like. The CPU 52, the ROM 54, the RAM 56, the storage 58 and theinput/output interface 60 are connected so as to be able to communicatewith one another via a bus 62. The above-described sensor 46 and heightadjusting section 50 and the like are connected to the input/outputinterface 60. The CPU 52 is a central computing processing unit, andexecutes various programs, and controls the motor, the cargo supportingsection 44, and the height adjusting section 50. Namely, based on asignal from the sensor 46, the CPU 52 reads-out a control program fromthe ROM 54 or the storage 58, and executes the control program by usingthe RAM 56 as a workspace, and controls the operation of the heightadjusting section 50.

As illustrated in FIG. 2, the second transporting vehicle 34 is atransporting vehicle that is larger than the first transporting vehicle32. The second transporting vehicle 34 includes a vehicle body 66 thattravels on the ground due to wheels 64 rotating. A motor and batterythat cause the wheels 64 to rotate, and a controller and the like areaccommodated in the vehicle body 66. Further, a rack placement section68 that passes-through in the vehicle transverse direction of the secondtransporting vehicle 34, is provided at the vehicle body 66. The pluralracks 70, on which the cargo 12 are accommodated in states of beingstacked in the vertical direction, are disposed in this rack placementsection 68. Two of the racks 70 are disposed in the rack placementsection 68 that is illustrated in FIG. 2, in a state of being lined-upin the vehicle longitudinal direction of the second transporting vehicle34. Note that it suffices to set the number of the racks 70, which aredisposed in the rack placement section 68, appropriately in accordancewith the size of the vehicle body 66 of the second transporting vehicle34. A storing/takeout device 72, which is for storing the cargo 12 inthe racks 70 that are disposed in the rack placement section 68 orremoving the cargo 12 from the racks 70 that are disposed in the rackplacement section 68, is provided at the vehicle body 66. Transferringof the cargo 12 between the first transporting vehicle 32 and the secondtransporting vehicle 34 is carried out via this storing/takeout device72.

As illustrated in FIG. 6, the third transporting vehicle 36 includes arack supporting section 76 that travels on the ground due to wheels 74rotating. A motor and a battery that cause the wheels 74 to rotate, anda controller and the like, are stored in the rack supporting section 76.The racks 70 are supported at the rack supporting section 76 in a statein which the racks 70 are loaded on the rack supporting section 76. Notethat transferring of the racks 70 is carried out between the thirdtransporting vehicle 36 and the second transporting vehicle 34 (see FIG.2). The transferring of the racks 70 between the third transportingvehicle 36 and the second transporting vehicle 34 (see FIG. 2) iscarried out automatically or via the cargo handler P.

As illustrated in FIG. 1, FIG. 6 and FIG. 7, the conveying device 30 fora building includes a loading section 80 that serves as the verticaldirection conveying section, the horizontal direction conveying sectionand the transfer section, and that moves in the vertical directionwithin a raising/lowering path 78 that is the space connecting thebuilding 28 and the underground passage 24 in the vertical direction.Further, the conveying device 30 for a building includes a supportingarm 82 that supports the loading section 80 such that the loadingsection 80 may slide in one direction in the horizontal direction and inthe direction opposite thereto. Moreover, the conveying device 30 for abuilding includes a raising/lowering mechanism 84 that serves as theheight adjusting section and that moves the loading section 80 in thevertical direction by moving the supporting arm 82 in the verticaldirection. Further, the conveying device 30 for a building includes asensor 88 that detects the situation at the periphery of a transferopening 86 that is described later, and a control section 90 thatcontrols the respective mechanisms that structure the conveying device30 for a building.

The loading section 80 includes a loading section main body 92 that issupported by the supporting arm 82, and a sliding plate 94 thatstructures the top surface portion of the loading section 80 and issupported so as to be able to slide with respect to the loading sectionmain body 92. Here, the sliding direction of the sliding plate 94 withrespect to the loading section main body 92 is direction that is ahorizontal direction and is orthogonal to the sliding direction of theloading section 80 with respect to the supporting arm 82. A firstsliding mechanism 96, which slides the loading section 80 with respectto the supporting arm 82, and a second sliding mechanism 98, whichslides the sliding plate 94 with respect to the loading section mainbody 92, are provided within the loading section main body 92.

The basic structure of the control section 90 of the conveying device 30for a building is similar to that of the control section 48 of theabove-described first transporting vehicle 32. Note that portions, whichcorrespond to the control section 48 of the first transporting vehicle32 that is illustrated in FIG. 4, of the control section 90 of theconveying device 30 for a building that is illustrated in FIG. 7 aredenoted by the same reference numerals as those of the control section48 of the first transporting vehicle 32. Further, the sensor 88, theraising/lowering mechanism 84, the first sliding mechanism 96, thesecond sliding mechanism 98 and the like are connected to theinput/output interface 60 of the control section 90 of the conveyingdevice 30 for a building. Based on a signal from the sensor 46, the CPU52 reads-out a control program from the ROM 54 or the storage 58, andexecutes the control program by using the RAM 56 as a workspace, andcontrols the operations of the raising/lowering mechanism 84, the firstsliding mechanism 96, and the second sliding mechanism 98.

As illustrated in FIG. 6, in the state in which the loading section 80is disposed at a position corresponding to the underground passage 24,the control section 90 operates the first sliding mechanism 96, andplaces the loading section 80 at a position adjacent to the thirdtransporting vehicle 36 within the underground passage 24. Next, due tothe control section 90 operating the second sliding mechanism 98 andoperating the raising/lowering mechanism 84, the predetermined cargo 12that is stored in the rack 70 on the third transporting vehicle 36 istaken-out. Next, the control section 90 operates the first slidingmechanism 96, and moves the loading section 80 and the cargo 12 that isplaced on the loading section 80 into the raising/lowering path 78.Next, due to the control section 90 operating the raising/loweringmechanism 84, the loading section 80 and the cargo 12 that is placed onthe loading section 80 are raised. Due thereto, as illustrated in FIG.1, the cargo 12 may be delivered to a predetermined delivery destination14 of the building 28. Note that the transfer opening 86, through whichthe loading section 80 and the cargo 12 that is placed on the loadingsection 80 may pass, is formed in a wall or the like of the deliverydestination 14. Note that the cargo 12 from the requester 16 within thebuilding 28 may be stored in the rack 70 that is on the thirdtransporting vehicle 36 by processes that are opposite to the processesthat are described above. Here, the sensor 88, which detects thesituation of the periphery of the transfer opening 86, is provided atthe wall or the like of the delivery destination 14 and the requester16.

(Function of Reducing Load on Cargo Handler P)

As illustrated in FIG. 1, the first transporting vehicles 32 and theconveying device 30 for a building that structure portions of the cargoconveying system of the above-described embodiment include the functionof reducing the load on the cargo handler P.

(Function of First Transporting Vehicle 32 for Reducing Load on CargoHandler P)

As illustrated in FIG. 3 and FIG. 5, the first transporting vehicle 32reduces the load on the cargo handler P by adjusting the verticaldirection height of the cargo supporting section 44 at the time when thecargo 12 is transferred between the first transporting vehicle 32 andthe cargo handler P.

Specifically, as illustrated in FIG. 3, FIG. 5 and FIG. 8, in step S1,based on information from the sensor 46, the control section 48 of thefirst transporting vehicle 32 determines whether or not there is a cargohandler P near to that first transporting vehicle 32. Note that thesensor 46 is a camera or an infrared sensor or the like. If thedetermination in step S1 is negative, the control section 48 carries outthe processing of step S1 again. If the determination in step S1 isaffirmative, in step S2, the control section 48 estimates the physiqueof the cargo handler P based on information from the sensor 46. Notethat the estimating of the physique of the cargo handler P is carriedout by comparing the information from the sensor 46 and data that isstored in the control section 48. As an example, the sensor 46 is acamera, the position of the eyes of the cargo handler P are detected bythe camera by image processing, and the height (the height from theground) of the eyes is computed. Due thereto, the height of the cargohandler P is estimated, and his/her physique is estimated. Further, asanother example, a point of the skeleton of the cargo handler P that isdetected by the camera, and data of points of skeletons that are storedwithin the control section 48, are compared, and the physique is therebyestimated. Next, in step S3, due to the control section 48 operating theheight adjusting section 50, the height of the cargo supporting section44 is adjusted to a height corresponding to the physique of the cargohandler P that has been estimated in step S2. In detail, the height ofthe cargo supporting section 44 (the portion where the cargo 12 that isto be handled by the cargo handler P is supported) is adjusted to aheight that is greater than or equal to the height of waist P1 and thatis at a position that faces, in the horizontal direction, the cargohandler P who is in a standing posture. Due thereto, the cargo handler Pwho is in a standing posture may receive the specific cargo 12 that issupported by the cargo supporting section 44 without bending his/herwaist or knees. Further, the cargo handler P may make the cargosupporting section 44 support the specific cargo 12 without the cargohandler P who is in a standing posture bending his/her waist or knees.In this way, at the first transporting vehicle 32 that structures aportion of the cargo conveying system relating to the presentembodiment, load at the time when the cargo handler P handles the cargo12 may be reduced.

(Function of Conveying Device 30 for a Building for Reducing Load onCargo Handler P)

As illustrated in FIG. 6, FIG. 7 and FIG. 9, the conveying device 30 fora building reduces load on the cargo handler P by adjusting the verticaldirection height of the loading section 80 at the time when the cargo 12is transferred between the conveying device 30 for a building and thecargo handler P.

Specifically, as illustrated in FIG. 7, FIG. 9 and FIG. 10, in step S21,based on information from the sensor 88, the control section 90 of theconveying device 30 for a building determines whether or not there is acargo handler P near to the transfer openings 86 of the deliverydestination 14 and the requester 16. Note that the sensor 88 is a cameraor an infrared sensor or the like. If the determination in step S21 isnegative, the control section 90 carries out the processing of step S21again. In contrast, if the determination in step S21 is affirmative, instep S22, the control section 90 estimates the physique of the cargohandler P based on information from the sensor 88. Note that theestimating of the physique of the cargo handler P is carried out bycomparing the information from the sensor 88 and data that is stored inthe control section 90. Next, in step S23, due to the control section 90operating the raising/lowering mechanism 84, the height of the loadingsection 80 is adjusted to a height corresponding to the physique of thecargo handler P that has been estimated in step S22. In detail, theheight of the loading section 80 (the height of the top surface of theloading section 80) is adjusted to a height that is greater than orequal to the height of the waist P1 and that is at a position thatfaces, in the horizontal direction, the cargo handler P who is in astanding posture. Due thereto, the cargo handler P who is in a standingposture may receive the cargo 12 that is on the loading section 80without bending his/her waist or knees. Further, the cargo handler P mayplace the cargo 12 on the loading section 80 without the cargo handler Pwho is in a standing posture bending his/her waist or knees. In thisway, at the conveying device 30 for a building that structures a portionof the cargo conveying system relating to the present embodiment, loadat the time when the cargo handler P handles the cargo 12 may bereduced.

Note that the above example describes an example in which the height ofthe cargo supporting section 44 or the loading section 80 is adjustedsuch that the cargo handler P who is in a standing posture may transferthe cargo 12 without bending his/her knees or waist. However, thepresent disclosure is not limited to this. For example, the posture ofthe cargo handler P who is seated in a chair or a wheelchair or the likemay be estimated, and the height of the cargo supporting section 44 orthe loading section 80 adjusted. Or, both the physique and the postureof the cargo handler P may be estimated, and the height of the cargosupporting section 44 or the loading section 80 adjusted. Moreover, theheight of the cargo supporting section 44 or the loading section 80 maybe adjusted while taking into consideration the horizontal distancebetween the cargo handler P and the cargo supporting section 44 or theloading section 80. Still further, the height of the cargo supportingsection 44 or the loading section 80 may be adjusted while taking intoconsideration the clothes of the cargo handler P.

Further, although the above example describes an example in which thephysique of the cargo handler P is estimated based on information fromthe sensor 46, 88, the present disclosure is not limited to this. Forexample, as illustrated in FIG. 11, an ID card 100, on which physiqueinformation of the cargo handler P is recorded, may be read-in by an IDcard reader 102 that serves as a physique information inputting section.Then, the control section 48, 90 may adjust the height of the cargosupporting section 44 or the loading section 80 based on the physiqueinformation of the cargo handler P that is read-in by the ID card reader102.

Although an embodiment of the present disclosure has been describedabove, the present disclosure is not limited to the above, and may, ofcourse, be implemented by being modified in various ways other than theabove, within a scope that does not depart from the gist thereof

What is claimed is:
 1. A cargo conveying device comprising: a horizontal direction conveying section that conveys cargo in a horizontal direction, and that includes a transfer section at which cargo is transferred between the transfer section and a cargo handler; a height adjusting section that adjusts a vertical direction height of the transfer section; and a control section that, at a time at a time at which cargo is transferred between the transfer section and a cargo handler, operates the height adjusting section, and adjusts the vertical direction height of the transfer section.
 2. The cargo conveying device of claim 1, further comprising a vertical direction conveying section that conveys cargo in a vertical direction.
 3. The cargo conveying device of claim 1, wherein the control section adjusts the vertical direction height of the transfer section to a height that corresponds to at least one of a physique or a posture of the cargo handler.
 4. The cargo conveying device of claim 3, further comprising a sensor that detects at least a portion of a body of the cargo handler, wherein: the control section estimates the at least one of the physique or the posture of the cargo handler based on a signal from the sensor, and the control section adjusts the height of the transfer section based on the at least one of the physique or the posture of the cargo handler that has been estimated.
 5. The cargo conveying device of claim 3, further comprising a physique information input section at which physique information of the cargo handler is input, wherein the control section adjusts the height of the transfer section based on the physique information of the cargo handler that has been input at the physique information inputting section.
 6. The cargo conveying device of claim 3, wherein the control section adjusts the vertical direction height of the transfer section to a height that is greater than or equal to a height of a waist of the cargo handler and that is at a position that faces the cargo handler in a horizontal direction.
 7. A cargo conveying system comprising: the cargo conveying device of claim 1; and a second cargo conveying device that conveys cargo and at which cargo is transferred between the cargo conveying device and the second cargo conveying device, wherein cargo is conveyed between a distribution warehouse and a cargo handler using the cargo conveying device and the second cargo conveying device.
 8. A method of operating the cargo conveying device of claim 1, comprising: receiving at least one of physique information or posture information of a cargo handler; and adjusting the vertical direction height of the transfer section based on the at least one of the physique information or the posture information of the cargo handler that has been received.
 9. The method of claim 8, wherein: the cargo conveying device includes a sensor that detects at least a portion of a body of a cargo handler, receiving the at least one of physique information or posture information of the cargo handler includes receiving of a signal from the sensor, and the method further comprises: estimating at least one of a physique or a posture of the cargo handler based on the signal from the sensor; and adjusting the height of the transfer section based on the at least one of the physique or the posture of the cargo handler that has been estimated. 